diff -r e2953ffd4e0b -r e9a460a0e638 src/kernels/ball_indicator.rs
--- a/src/kernels/ball_indicator.rs	Fri May 15 14:40:02 2026 -0500
+++ b/src/kernels/ball_indicator.rs	Sun Jul 19 07:34:39 2026 +0200
@@ -176,7 +176,7 @@
         if N == 1 {
             2.0 * r
         } else if N == 2 {
-            r * r
+            2.0 * r * r
         } else {
             (2.0 * r).powi(N as i32) * F::cast_from(factorial(N))
         }